I recently switched web servers and when i try to post a new topic i get

FATAL ERROR: could not open message store for forum id#60000 fudforum

Location of forum:
forum.gamepaduniverse.com

Full error message:

Warning: fopen(C:/Inetpub/vhosts/gamepaduniverse.com/forum.gamepaduniverse.com/fudforum/messages/msg_60000): failed to open stream: Permission denied in C:\Inetpub\vhosts\gamepaduniverse.com\forum.gamepaduniverse.com\fudforum\theme\Gamepad_Universe\post.php on line 2016
FATAL ERROR: could not open message store for forum id#60000